Two-dimensional rangefinding sensor

Details Two-dimensional rangefinding sensor Two-dimensional rangefinding sensor

1996-05-21

1998-05-19

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with one projected beam

356 51, G01C 308

Patent

active

057542805

ABSTRACT:
A two-dimensional rangefinding sensor of the present invention consisting of an illuminating device for projecting light beams, which undergoes luminance modulation at a predetermined frequency for a predetermined duration with a predetermined cycle time, onto an object, an image-formation optical system for forming an image of the object illuminated with light beams which have undergone the luminance modulation and which have been projected from the illuminating device, a two-dimensional image sensor mounted on an image-formation plane of the image-formation optical system, a driving means for performing a modulation driving operation on an electrode terminal, which is operative to determine the sensitivity of the two-dimensional image sensor at the frequency, and a reading means for reading a signal corresponding to a signal charge generated in each of picture elements of the image sensors. Thereby, a range-data image of a three-dimensional object can be obtained by using a two-dimensional image sensor without mechanically scanning with illumination light.

REFERENCES:
patent: 4935616 (1990-06-01), Scott
patent: 5579103 (1996-11-01), Tachikawa

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